Journal of Endodontics Impact Factor & Information

Publisher: American Association of Endodontists; American Dental Association, Elsevier

Journal description

The Journal of Endodontics, the official journal of the American Association of Endodontists, publishes scientific articles, case reports and comparison studies evaluating materials and methods of pulp conservation and endodontic treatment. Endodontists and general dentists can learn about new concepts in root canal treatment and the latest advances in techniques and instrumentation in the one journal that helps them keep pace with rapid changes in this field. The Journal has an impact factor of 1.933, the highest of any journal in the specialty (2005 Journal Citation Index).

Current impact factor: 3.38

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 3.375
2013 Impact Factor 2.788
2012 Impact Factor 2.929
2011 Impact Factor 2.88
2010 Impact Factor 3.291
2009 Impact Factor 2.953
2008 Impact Factor 2.727
2007 Impact Factor 3.369
2006 Impact Factor 3.077
2005 Impact Factor 1.933
2004 Impact Factor 1.323
2003 Impact Factor 1.056
2002 Impact Factor 0.748
2001 Impact Factor 0.668
2000 Impact Factor 0.668
1999 Impact Factor 0.863
1998 Impact Factor 0.731
1997 Impact Factor 0.906
1996 Impact Factor 0.857
1995 Impact Factor 0.651
1994 Impact Factor 0.632
1993 Impact Factor 0.543
1992 Impact Factor 0.668

Impact factor over time

Impact factor

Additional details

5-year impact 3.59
Cited half-life 6.40
Immediacy index 0.36
Eigenfactor 0.02
Article influence 0.63
Website Journal of Endodontics website
Other titles Journal of endodontics, JOE
ISSN 0099-2399
OCLC 1705956
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details


  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors pre-print on any website, including arXiv and RePEC
    • Author's post-print on author's personal website immediately
    • Author's post-print on open access repository after an embargo period of between 12 months and 48 months
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months
    • Author's post-print may be used to update arXiv and RepEC
    • Publisher's version/PDF cannot be used
    • Must link to publisher version with DOI
    • Author's post-print must be released with a Creative Commons Attribution Non-Commercial No Derivatives License
    • Publisher last reviewed on 03/06/2015
  • Classification

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: A thorough knowledge of root canal anatomy is of paramount importance for successful root canal treatment. This study evaluated the internal anatomy of palatal roots from maxillary first molar using micro-computed tomography (microCT). Palatal roots of extracted maxillary first molars (n= 169) were scanned using microCT and several anatomic parameters were analyzed, including classification of main canals, occurrence and location of lateral canals, degree of curvature, position of the main foramen, presence of apical constriction, diameters at 1 mm and 2 mm from the apex and at 1 mm from the foramen, minor dentin thickness in these regions, and canal volume, surface area, and convexity. All canals were classified as Vertucci type I. The cross-sections presented an oval shape in 61% of the canals. Lateral canals were found in 25% of the samples. The main foramen did not coincide with the root apex in 95% of the cases. Only 8% of the canals were classified as straight. Apical constriction was identified in 38% of the roots. Minor and major canal diameters and minor dentin thickness were decreased near the apex. The mean minor dentin thickness 1 mm from the foramen was 0.82 mm. Palatal canals exhibited a mean volume of 6.91 mm3, a mean surface area of 55.31 mm2, and were cylindrical in shape. Conclusions The root canal configuration of all palatal roots was classified as type I. However, the high occurrence of moderate/severe curvatures, oval-shaped cross-sections and lateral canals, the noncoincidence of the apical foramen with the root apex, and the absence of apical constriction in the majority of cases are factors that should be taken into account during treatment of maxillary first molar palatal canals.
    Journal of Endodontics 10/2015;

  • Journal of Endodontics 10/2015; DOI:10.1016/j.joen.2015.09.006
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    ABSTRACT: This study was done to develop a glide path preparation nickel-titanium rotary instrument by size optimization procedures and evaluate the properties of the prototype. G-1 and G-2 files were tested for cyclic fatigue, torsional resistance, and screw-in force. The cyclic fatigue resistance was compared by measuring the number of cycles to failure by using a 90° curved metal canal (n = 10). The torsional resistance was evaluated at 3 levels (2, 4, and 6 mm from the file tip) by measuring the ultimate torsional load (n = 10 each level). The screw-in forces (n = 5) were measured during sequential pecking in a simulated resin block to the end of foramen by using the customized shaping device (AEndoS). Meanwhile, finite element models of G-1 and G-2 files were made by reverse engineering, and their bending stiffness and torsional properties were calculated. By analyzing the results from mechanical tests and finite element analysis, a universal G (uG) file was designed to have intermediary mechanical properties, and then the prototype was fabricated by the manufacturer. Cyclic fatigue and torsional resistance tests and screw-in force with the uG were compared with G-1 and G-2 files. The prototype of uG file showed higher cyclic fatigue resistance than the G-2 file and intermediary torsional strength and screw-in forces between the G-1 and G-2 files. The prototype production from a size optimization procedure produced appropriate mechanical properties for the purpose of development. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
    Journal of Endodontics 03/2015; 41(6). DOI:10.1016/j.joen.2015.01.025
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study aimed to investigate the effects of 2 inorganic polyphosphates (poly[P]) are linear polymers of orthophosphate (Pi) residues linked by energy-rich phosphoanhydride poly(P) compounds, sodium triphosphate (STP, Na5P3O10) and sodium hexametaphosphate (SHMP, Na15P13O40 ∼ Na20P18O40) on the proliferation, odontoblastic differentiation, and angiogenic potential of human dental pulp cells (HDPCs). Differentiation was measured by alkaline phosphatase activity, calcified nodule formation by alizarin red staining, and marker messenger RNA (mRNA) levels by reverse-transcription polymerase chain reaction. In vitro angiogenesis was quantified by migration, mRNA levels of angiogenic genes, and endothelial tube formation. STP and SHMP dose dependently increased the proliferation and ALP activity and enhanced mineralized nodule formation and odontoblast marker mRNAs of HDPCs. STP and SHMP resulted in the up-regulation of angiogenic genes in HDPCs. Endothelial cells treated with conditioned medium collected from STP- and SHMP-exposed HDPCs showed an increase in migration and capillary tube formation. Knockdown of the expression of the genes encoding of inorganic pyrophosphate by small interfering RNA attenuated the STP- and SHMP-induced odontogenic differentiation and angiogenic potential. This study showed that STP and SHMP promote the growth, differentiation, and angiogenic potential of HDPCs. These results suggest that STP and SHMP may be candidates for dental pulp tissue engineering and regenerative endodontics. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
    Journal of Endodontics 03/2015; 41(6). DOI:10.1016/j.joen.2015.01.038
  • [Show abstract] [Hide abstract]
    ABSTRACT: Tooth autotransplantation is a viable treatment option for tooth replacement when a suitable donor tooth is available. These case reports described significant vertical bone growth after autotransplantation of a mature third molar. The left mandible third molars (n = 2) were transplanted to the missing tooth in the left mandible. The patient follow-up period was 10 years after transplantation. Clinical examination revealed no mobility of the transplanted tooth. Radiographic examination indicated that bone regeneration occurred around the transplanted tooth. Vertical bone growth was observed in the cervical area of the root surface and the recipient bone. In autotransplantation of mature teeth, long-term follow-up results indicate that vertical bone growth can be expected if viability of the periodontal ligament cells is maintained. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
    Journal of Endodontics 03/2015; 41(8). DOI:10.1016/j.joen.2015.01.036
  • [Show abstract] [Hide abstract]
    ABSTRACT: Endogenous cannabinoid compounds are involved in many physiological processes, including bone metabolism. Cannabinoid receptor 2 (CB2) plays a role in modulating bone density, but published research results are conflicting. Furthermore, the specific role of CB2 in inflammation-induced bone resorption and craniofacial bone density has not been reported. The objective of this study was to assess the role of CB2 in dental pulp exposure-induced periapical bone loss and mandibular bone density. Adult female wild-type (WT) and CB2 homozygous knockout (KO) mice were used. Pulp exposures were created unilaterally in the mandibular first molars, and the pulp was left exposed to the oral cavity to induce periapical lesion formation. Mandibles were harvested 26 days after pulp exposure. Mandibular bone mineral density and periapical lesion volume were assessed using micro-computed tomographic imaging. Periapical lesion volume measured on the mesial root of the pulp-exposed first molar was significantly less in CB2 KO than WT mice (P < .05). No significant difference was detected between KO and WT mice in the size of the PDL space measured on the mesial root of the contralateral intact first molar. CB2 KO mice exhibited greater mandibular bone density than WT mice (P < .05). CB2 plays a role in mandibular bone metabolism. Increased bone density in CB2 KO mice may contribute to the smaller periapical lesion size observed after pulp exposure in KO compared with WT mice. Additional experiments are needed to further elucidate the function of CB2 and clinical implications of cannabinoids on bone and periapical pathosis. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
    Journal of Endodontics 03/2015; 41(6). DOI:10.1016/j.joen.2015.01.030
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study investigated the presence of target bacterial species and the levels of endotoxins in teeth with apical periodontitis. Levels of inflammatory mediators (interleukin [IL]-1β and tumor necrosis factor [TNF]-α) were determined after macrophage stimulation with endodontic content after different phases of endodontic therapy using different irrigants. Thirty primarily infected root canals were randomly assigned into 3 groups according to the irrigant used for root canal preparation (n = 10 per group): GI: 2.5% sodium hypochlorite, GII: 2% chlorhexidine gel, and GIII (control group): saline solution. Root canal samples were taken by using paper points before (s1) and after root canal instrumentation (s2), subsequently to 17% EDTA (s3), after 30 days of intracanal medication (Ca[OH]2 + saline solution) (s4), and before root canal obturation (s5). Polymerase chain reaction (16S recombinant DNA) and limulus amebocyte lysate assay were used for bacterial and endotoxin detection, respectively. Macrophages were stimulated with the root canal contents for IL-1β/TNF-α measurement using enzyme-linked immunosorbent assay. Porphyromonas gingivalis (17/30), Porphyromonas endodontalis (15/30), and Prevotella nigrescens (11/30) were the most prevalent bacterial species. At s1, endotoxins were detected in 100% of the root canals (median = 32.43 EU/mL). In parallel, substantial amounts of IL-1β and TNF-α were produced by endodontic content-stimulated macrophages. At s2, a significant reduction in endotoxin levels was observed in all groups, with GI presenting the greatest reduction (P < .05). After a root canal rinse with EDTA (s3), intracanal medication (s4), and before root canal obturation (s5), endotoxin levels reduced without differences between groups (P < .05). IL-1β and TNF-α release decreased proportionally to the levels of residual endotoxin (P < .05). Regardless of the use of sodium hypochlorite or CHX, the greatest endotoxin reduction occurs after chemomechanical preparation. Increasing steps of root canal therapy associated with intracanal medication enhances endotoxin reduction, leading to a progressively lower activation of proinflammatory cells such as macrophages. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
    Journal of Endodontics 03/2015; 41(6). DOI:10.1016/j.joen.2015.01.017
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    ABSTRACT: Introduction: Proteinases play pivotal roles in Candida albicans infections. Although the yeast can colonize the pulpal environment, there is no information about the enzymatic profile of this organism. This in vitro study aimed to determine the proteolysis levels and to investigate differences in the expression of aspartyl proteinase genes (Sap 1, Sap 2, and Sap 4) among various root canal strains and clinical isolates from the lingual dorsum. Methods: The extracellular proteinase activity of 104 C. albicans samples isolated from the lingual dorsum and from necrotic root canals was measured with respect to bovine serum albumin degradation after 5 days of incubation at 37°C. We used reverse-transcription polymerase chain reaction, a highly sensitive method, to detect messenger RNA transcripts of aspartyl proteinase genes (Sap 1, Sap 2, and Sap 4). The C. albicans strain SC 5314 was used as a positive control for both experiments because it is recognized as being highly proteolytic. All tests were performed in triplicate. Results: Regardless of the isolation site, all C. albicans strains produced an opaque precipitation halo around the colonies, indicating some proteinase activity. However, the production of proteinase on the plates was significantly greater (P < .05) by the endodontic samples. Sap 2 was the most commonly expressed gene in all samples. Among the root canal samples, the detection of Sap 1 transcripts was always associated with the expression of Sap 2 and Sap 4. Sap 4 gene expression was detected in all root canal samples. The simultaneous expression of the 3 investigated Sap genes (Sap 1, Sap 2, and Sap 4) was more common in strains isolated from the lingual dorsum (50%) than in those isolated from root canals (29.4%). Conclusions: The increased proteolytic activity as well as the distinct pattern of Sap expression observed among the root canal samples may suggest a pathogenic role for C. albicans in endodontic infections.
    Journal of Endodontics 03/2015; 41(6). DOI:10.1016/j.joen.2015.01.012
  • [Show abstract] [Hide abstract]
    ABSTRACT: The purpose of this retrospective study was to determine the incidence of missed inferior alveolar nerve (IAN) blocks by using a 1- or 2-cartridge volume of 2% lidocaine with 1:100,000 epinephrine in vital asymptomatic teeth and in emergency patients with symptomatic irreversible pulpitis. As part of 37 studies, 3169 subjects/patients were evaluated for missed IAN blocks. The study included 2450 asymptomatic subjects and 719 emergency patients presenting with symptomatic irreversible pulpitis. Each subject or patient received either a 1- or 2-cartridge volume of 2% lidocaine with 1:100,000 epinephrine. A missed block was defined as no lip numbness at 15-20 minutes after the IAN block. The effect of anesthetic volume on the incidence of missed blocks was assessed by using mixed models logistic regression with individual studies as a random effect. The incidence of missed blocks for asymptomatic subjects was 6.3% for the 1-cartridge volume and 3.8% for the 2-cartridge volume. For patients presenting with irreversible pulpitis, the incidence of missed blocks was 7.7% for the 1-cartridge volume and 2.3% for the 2-cartridge volume. In both asymptomatic subjects and patients with irreversible pulpitis, the 2-cartridge volume was significantly (P = .0395) better than the 1-cartridge volume. There were no significant effects for pulpal diagnosis (P = .7523) or the pulpal diagnosis and anesthetic volume interaction (P = .3973). Concerning missed IAN blocks, we concluded that administration of a 2-cartridge volume was significantly better (P = .0395) than a 1-cartridge volume in both asymptomatic subjects and emergency patients presenting with irreversible pulpitis. Copyright © 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
    Journal of Endodontics 03/2015; 41(5). DOI:10.1016/j.joen.2015.01.029